Luminaire with controllable light emission

Patent metadata

Field	Value
Publication number	US-10416377-B2
Application number	US-201715450578-A
Country	US
Kind code	B2
Filing date	Mar 6, 2017
Priority date	May 6, 2016
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

A luminaire includes a first waveguide having a first primary light emitting surface directed in a first direction and a first secondary light emitting surface directed in a second direction. A second waveguide having a second primary light emitting surface directed in the second direction and a second secondary light emitting surface directed in the first direction. A first plurality of LEDs are optically coupled to the first waveguide and a second plurality of LEDs are optically coupled to the second waveguide. The first and second waveguides are independently operable. The first and second plurality of LEDs may comprise LED groups where each of the LED groups are independently controllable. The light emission pattern and light properties of the emitted light are controllable.

First claim

The invention claimed is:

1. A luminaire comprising:
a first waveguide having a first primary light emitting surface directed in a first direction and a first secondary light emitting surface directed in a second direction, and a second waveguide having a second primary light emitting surface directed in the second direction and a second secondary light emitting surface directed in the first direction, the first secondary light emitting surface and the second secondary light emitting surface being disposed adjacent one another such that the first primary light emitting surface and the second primary light emitting surface face generally away from one another, and the first primary light emitting surface comprising a first plurality of light extraction features that emit light in a first light emission pattern and the second primary light emitting surface comprising a second plurality of light extraction features that emit light in a second light emission pattern, the first light emission pattern being different than the second light emission pattern;
a first plurality of LEDs being optically coupled to the first waveguide such that activation of the first plurality of LEDs causes light to be emitted from the first primary light emitting surface and a second plurality of LEDs being optically coupled to the second waveguide such that activation of the second plurality of LEDs causes light to be emitted from the second primary light emitting surface, and a controller controlling operation of the first plurality of LEDs and the second plurality of LEDs such that the first plurality of LEDs and the second plurality of LEDs are independently operable.

2. The luminaire of claim 1 wherein the first plurality of LEDs comprises a first plurality of LED groups, wherein the controller controls operation of the first plurality of LED groups such that each one of the first plurality of LED groups is independently controllable.

3. The luminaire of claim 2 wherein the second plurality of LEDs comprises a second plurality of LED groups, wherein the controller controls operation of the second plurality of LED groups such that each one of the second plurality of LED groups is independently controllable.

4. The luminaire of claim 1 wherein the first waveguide comprises a first plurality of waveguide sections and the first plurality of LEDs comprises a first plurality of LED groups, one of the first plurality of LED groups being associated with one of the first plurality of waveguide sections, wherein the controller controls operation of the first plurality of LED groups such that each one of the first plurality of LED groups is independently controllable.

5. The luminaire of claim 4 wherein the second waveguide comprises a second plurality of waveguide sections and the second plurality of LEDs comprises a second plurality of LED groups, one of the second plurality of groups of LEDs being associated with one of the second plurality of waveguide sections, wherein the controller controls operation of the second plurality of LED groups such that each one of the second plurality of LED groups is independently controllable.

6. The luminaire of claim 5 wherein the first plurality of waveguide sections are coextensive with the second plurality of waveguide sections.

7. The luminaire of claim 1 wherein the controller controls the output of the first plurality of LEDs and the second plurality of LEDs based on an input from a detector.

8. The luminaire of claim 7 wherein the detector comprises an ambient light detector for detecting ambient light.

9. The luminaire of claim 8 wherein the controller alters the lux output level of at least one of the first plurality of LEDS and the second plurality of LEDs in response to input from the ambient light detector.

10. The luminaire of claim 7 wherein the detector comprises an occupancy detector for detecting a stimulus adjacent the luminaire.

11. The luminaire of claim 10 wherein the controller alters the lux output level of at least one of the first plurality of LEDs and the second plurality of LEDs in response to input from the occupancy detector.

12. The luminaire of claim 1 wherein the controller controls the output of the first plurality of LEDs and the second plurality of LEDs based on an input from a user control.

13. The luminaire of claim 12 wherein the user control comprises a capacitive sensor.

14. The luminaire of claim 13 wherein the capacitive sensor independently controls the on/off state and dimming levels of at least one of the first plurality of LEDs and the second plurality of LEDs.

15. The luminaire of claim 12 wherein the user control comprises a remote control that communicates with the controller over a wireless connection.

16. The luminaire of claim 5 wherein the first plurality of waveguide sections are coplanar and the second plurality of waveguide sections are coplanar.

17. The luminaire of claim 3 wherein independent energization of the first plurality of LED groups and the second plurality of LED groups generates a directional light pattern, the directional light pattern being variable along an axis of orientation of the first waveguide and the second waveguide and in a plane perpendicular to the axis of orientation.

18. The luminaire of claim 1 wherein the first waveguide and the second waveguide are supported on a support structure such that the primary light emitting surfaces are disposed horizontally.

19. A luminaire comprising: a plurality of first waveguide sections, each of the plurality of first waveguide sections having a first primary light emitting surface directed in a first direction and a first secondary light emitting surface directed in a second direction and a plurality of second waveguide sections, each of the plurality of second waveguide sections having a second primary light emitting surface directed in the second direction and a second secondary light emitting surface directed in the first direction, the first secondary light emitting surfaces and the second secondary light emitting surfaces being disposed adjacent one another such that light is primarily emitted from the luminaire through at least one of the first primary light emitting surface and second primary light emitting surface; at least one first LED being optically coupled to each of the first waveguide sections and at least one second LED being optically coupled to each of the second waveguide sections, and a controller controlling operation of the at least one first LED and the at least one second LED such that each of the at least one first LED and the at least one second LED are independently operable.

20. The luminaire of claim 19 wherein the first waveguide sections are in a one-to-one relationship with the second waveguide sections.

21. The luminaire of claim 19 comprising:
a support structure being supportable on a surface, the support structure supporting the plurality of first waveguide sections and the plurality of second waveguide sections;
each of the at least one first LED and the at least one second LED being operable to emit light from the waveguide having a light emission pattern and at least one light property, the controller controlling operation of the at least one first LED and the at least one second LED such that the light emission pattern and the at least one light property of the emitted light are controllable.

22. The luminaire of claim 21 wherein the at least one light property comprises at least one of color, color temperat

Assignees

• Cree Inc

Inventors

• Girotto Claudio
• Tarsa Eric
• Snell Nathan Ray
• Ibbetson James
• Youmans Mark
• Lowes Theodore D
• Keller Bernd
• Creasman Ethan
• Bernard Randall Levy
• Dungan William L

Classifications

• G02B6/0078

  Side-by-side arrangements, e.g. for large area displays · CPC title

• F21S6/005

  with a lamp housing maintained at a distance from the floor or ground via a support, e.g. standing lamp for ambient lighting · CPC title

• F21V23/0485

  the sensor sensing the physical interaction between a user and certain areas located on the lighting device, e.g. a touch sensor · CPC title

• F21V23/0471

  the sensor detecting the proximity, the presence or the movement of an object or a person · CPC title

• G02B6/0045

  by shaping at least a portion of the light guide · CPC title